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EDM Drilling

A reliable source for EDM Drilling information and leading EDM Drilling Companies

It is an alternative to conventional drilling methods when the material is too strong and resistant as it is an effective machining method for even hard materials such as polycrystalline diamond stock, magnet materials and carbide. Read More…

EDM Drilling EDM drilling is a specialized tooling process that creates holes in metal parts and products by using electrical energy in the form of sparks to erode the metal.
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Leading Manufacturers

Waukesha, WI  |  800-798-9228

XACT Wire EDM Corp. is one of the largest and most experienced Wire EDM Companies in the country. Our Wire EDM manufacturing capabilities include a large number of high-end machines with two locations offering advanced CMM and video inspection. We work with a wide variety of customers in the medical, defense, aerospace, automation, robotics industries as well as many companies in the metal machining, tooling & stamping industries. We are ISO 9001:2015 certified. Contact us today to learn more!

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Xact Wire EDM Corporation $$$

Hutchinson, MN  |  320-587-5923

3-D CNC manufactures precision tooling, prototypes and automated machines. We provide EDM services (4-axis wire, sinker, small hole EDM), CNC machining and grinding. We specialize in smaller, EDM intensive component parts and tooling assemblies. We are ISO 9002 certified.

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3-D CNC, Inc. $$$

Rockford, IL  |  815-397-9707

Since 1973 EWT/3DCNC has dedicated their service and support to their customers with Engineering, Quality Machining, Building Molds & Dies, and handling EDM Consumable Supplies. Our experienced team of professionals have the knowledge of helping and supporting you with all of your needs.

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EWT/3DCNC Inc. $$$

Anaheim, CA  |  714-523-4336

Since 1981, King Tek EDM and Precision Machining has grown into a full-service machine shop capable of producing parts in there entirety. Our primary focus is electrical discharge machinery as we offer wire EDM, sinker EDM, and small hole EDM. Utilizing the latest wire machining technology, we are involved in new applications of a variety of industries outside tool and die like aerospace.

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King-Tek EDM & Precision $$$
placeholder image Xact Wire EDM Corporation 3-D CNC, Inc. EWT/3DCNC Inc. King-Tek EDM & Precision

Also known as electrical discharge machining drilling, EDM drilling is accomplished one of two ways - ram EDM and small hole EDM, both of which use an electrode that shoots out electrical charge or sparks which are hot enough to erode away any metal. Holes can be made on curved and angular surfaces, and they are drilled quickly, with accuracy and completely straight. Any electrically conductive material may be drilled by this method, including aluminum, copper, steel, stainless steel, zinc, tin, titanium, gold, lead, silver, iron and bronze.

Applications that make use of EDM drilling capabilities include for the creating of holes in turbine blades, fuel injectors, cutting tool coolant holes, hardened punch ejector holes, plastic mold vent holes and wire EDM starter holes which are necessary to start the process of wire cutting using electrical discharge machining. Precise and small holes are required in many different products and therefore EDM machining is used widely in the manufacturing, medical, automotive and aerospace industries.

The EDM drilling process begins with a round, hollow electrode made of brass or a similar metal, which then rotates around a spindle and shoots out electrical sparks that are extremely hot. The metal part or product is clamped down tight so it cannot move, and computer numeric controlled software determines the direction in which the electrode will point. A dielectric fluid bath, usually water based, is used to conduct the electrical current and to reduce the process temperature.

It also washes away the eroded material debris and prevents any premature sparking which would result in an imprecise finish. When the electrical sparks, created by a servo-controlled generator, shoot out of the tip, an electric field is created in the gap between the electrode and metal work piece. The surface is slowly eroded by this electrical energy, forming microscopic pockets that eventually form a perfect hole.

Hole diameters may be anywhere from 0.03 to 400 mm, and have the option to be extremely deep-up to 100 times the hole diameter. This is a key benefit in EDM drilling, as standard drilling is confined to depths 5 to 6 times the hole's diameter. Those that drill long or large holes through hard materials are often equipped with an automatic electrode changer because they tend to wear out quickly. Though it is costly to replace the electrodes used, this process of EDM drilling is still a cost effective solution to many drilling needs.

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